JPS58101867A - Tilter for car body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is a vehicle body tilt! *F relates to a vehicle body tilting device particularly suitable for tilting the vehicle body when #L road heavy vehicle passes through a high altitude curve.

Traditional vehicle body tilt! As for Mw, it's a pendulum! 1 is well known. The pendulum 9W1 is 1 as shown in Figure 1.
A pair of rollers provided on the rotating beam 2 degrees rotating beam 2 provided on the trolley 1' 3. It is composed of a swinging pillow 4. A vehicle body 6 is supported on the rocking pillow 4 via a pillow spring 5. 13 is a slider and 14 is a center bin. On a zero-curve road, the force F of gravity W and centrifugal force P acts on the floor surface at an angle β.

In a vehicle not equipped with an Iff pendulum device jq, this angle β is very large (although it can be made considerably smaller by providing the pendulum device 1.

However, when tilting the vehicle body using such a pendulum device 1, the center of gravity of the vehicle moves to the outer track side from the normal line at the center of the track 9, so the eccentricity becomes large h<, and the safety factor against overturning the vehicle is reduced. It had the drawback of being small.

In addition, as shown in Figure 2, the method of tilting the car body by changing the height of the air springs has the characteristics of preventing deterioration of ride comfort due to centrifugal force, and having a small eccentricity and high safety against capsizing. However, the amount of air required to tilt the car body is large.

It has the disadvantage that it is difficult to secure space for the air supply equipment. Furthermore, if the control system in a room with this type of system stops due to a failure, it will be the same as if it were not equipped with the control system, so it would be necessary to significantly reduce the speed when traveling on curves, which could cause disruption to the timetable. There was a fear that it would happen.

In view of the above points, the present invention prevents deterioration of riding comfort due to centrifugal force when passing through a curve, has a small eccentricity and requires less control power, has high safety in the event of a control system failure and stops, and is capable of passing through a single curve. To provide a vehicle body tilting device that does not require a significant reduction in speed.

The present invention provides a control device that changes the height of an air spring that supports the vehicle body in order to prevent the deterioration of riding comfort due to centrifugal force when passing through a curve, and also provides a pendulum device using rollers and links. At the same time as tilting, the eccentricity is kept small, and the power used in the control!A position is also reduced.In order to operate the two vehicle body tilting mechanisms well, the control IrIW1 reduces the frictional force of rollers, links, etc. The unique feature of this tournament is that it gives a tilting command so that the centrifugal force component that overcomes the force remains.

An embodiment of the present invention is shown in FIG. 3, and a block diagram of the air spring control device is shown in FIG. 114. In these figures,
Components that are the same as those in the conventional example are designated by the same reference numerals. The air spring support supporting the vehicle body 6 is formally the same as the air spring shown in Fig. 2, but the height of the air spring support is reduced in this embodiment, which is more compact due to the shorter variable stroke. Detect traveling speed as control to change *w'4!
122. Distance counter z1 Each controller inputs these outputs and outputs a tilt command, and a servo valve supplies and discharges air to and from the air springs on both sides of the vehicle body 6 according to the output of the controller 9.5. Air H that supplies air to the servo valve 2
It consists of 26.

FIG. 5 shows the cant angle in curve 1 and the curve 1 as an example.
This figure shows the time change of the slope command current for each controller when passing through .

In the figure, b' is the optimum curve for the tilt command current when the vehicle body 6 is tilted only by the air spring height adjustment method shown in FIG. In other words, the required vehicle body tilt angle is proportional to the cant angle 1 when the running speed is constant, and the displacement of the air spring is the integral of the air flow rate to be supplied and discharged, so the tilt command is the differential value of the required vehicle body tilt angle. It is appropriate to provide this continuously, and if the traveling speed changes, the system is configured to make corrections within the controller. Furthermore, the curve b′ is smaller than the optimal finger + b I , so centrifugal force remains;
Although the pendulum device l using rollers tries to swing naturally, there is a limit to overcome the frictional force of the rollers, and in this embodiment, a command value smaller than the limit curve b' is given. therefore,
The pendulum amp also operates, and forced inclination due to air spring application and natural inclination due to pendulum MIN are performed at the same time, preventing deterioration of riding comfort due to centrifugal force. The eccentricity can be suppressed to a small value compared to the conventional method, and safety can be increased.

Also, compared to forced tilting devices using only air springs,
Since less power is needed to supply air, energy can be saved. Furthermore, even if the control system fails and stops and control is not performed, the screw device 1 operates and maintains the tilting function sufficiently, so the vehicle can travel at a speed that does not exceed the set value. This eliminates the inconvenience of confusing schedules. Note that in this embodiment, the screw *
If the controller compensates for the tilt command so as to reduce the horizontal jerk of the vehicle body that occurs when fl operates, it is possible to further improve the riding comfort.

FIG. 6 is a control block diagram showing another embodiment of the present invention. In this embodiment, the servo valve 5 controls the amount of air supplied to and discharged from the air spring λ by the output of the pulley that controls the air spring circle. and an air supply 11[26] to make the horizontal acceleration zero when traveling on one curve (a feedback system is configured.In this embodiment as well, the gain of the servo amplifier is adjusted so that the pendulum device 1 operates. The constant value is set smaller than the appropriate value, and consideration is given so that a centrifugal force component that overcomes the frictional force of the rollers in the pendulum device remains.Therefore, in order to prevent deterioration of riding comfort due to centrifugal force, the above-mentioned implementation is necessary. Although somewhat inferior to the example, similar effects can be obtained for q problems such as eccentricity, and a simpler and cheaper device can be constructed.

As described above, according to the present invention, deterioration of riding comfort due to centrifugal force when passing through a curve is prevented, eccentricity is small, control power is small, safety is high in the event of a failure or stoppage of the control system, and curve passing speed is reduced. Therefore, it is possible to provide a vehicle body tilting device that does not require a significant reduction in the height of the vehicle.

[Brief explanation of the drawing]

Figure 1 is a front view of a conventional umbrella body tilting device equipped with a screw am, and Figure 2 is a conventional vehicle body tilting device that displaces the air spring height*
3 is a front view showing an embodiment of the vehicle body tilting device according to the present invention, FIG. 4 is a block diagram showing the control system of FIG. 3, and FIG. 5 is a cant amount when passing through a curve. FIG. 6 is a block diagram showing a control system in another embodiment of the vehicle body tilting device according to the present invention. 1... Pendulum 9I! Placement, addition...Air spring, 21,311...2t2] Figure 73 'J'4 Figure A Work 5 Figure 6m

Claims (1)

[Claims] 1. The vehicle body is supported on a bogie via an air spring and a pendulum device, and a control device is provided for controlling the height of the air spring in correspondence with the shape of the curved track. Vehicle body tilting device. 2. Claim 1 states that the invention is constituted by a servo valve that controls lff1e@gosan', a controller that controls the servo valve, with the outputs of the lff1et' line speed detector and mileage counter as inputs. Features a vehicle body tilting device. 3.# The vehicle body according to claim 2, wherein a tilting command in which a centrifugal force component that overcomes the maximum frictional force generated when the sffff controller element 1711Wl remains is outputted to the servo valve. Slope III position. 4. The vehicle body tilt side L according to claim 3, characterized in that the controller compensates for a tilt command so as to reduce the horizontal acceleration of the vehicle body that occurs when the pendulum device operates. In the first range, the control device includes a detector that detects horizontal acceleration of the vehicle body, a servo amplifier that amplifies the output of the detector, and an output of the servo amplifier that supplies air from an air supply source to the air spring. A vehicle body tilting fI4 device comprising a servo valve for discharging. 6. Claim 5 is characterized in that the gain of the servo amplifier is reduced so as to output an output such that a centrifugal force component that overcomes the frictional force generated in the operation of the screw device remains. Vehicle body tilting device.